Of course, ultimately I take God's existence on faith. And you take his non-existence on faith. But God is the only explanation for my experience as a man, my hopes, dreams, the love I have for my family, the value of human life - these can only have meaning if God exists. If God doesn't exist friend, then you are no more valuable than a rock, and your thoughts and theories are irrational because they emanate from mere chemical processes in your brain (colliding atoms). Do you live like there is no God? Do you live as if love has no meaning, do you look at your family and think they have value or do you see them as rocks? You see, human experience and life are consistent with the existence of a personal infinite creator God, but is absolutely at odds with a naturalistic material universe. If you want to believe in naturalism and be consistent, then you must deny the mannishness of man - man becomes a meaningless rock, and his hopes, dreams, feelings, desires are mere matter in motion. Care to take this further?
It's really very simple. My life and the lives of my loved ones have value to me and meaning for me. My place in a livable society, and the responsibility to maintain and improve it for them, yields the same valuable result for you and yours. It's an vast series of economic transactions of convenience for the "good" of each of us resulting in the "good life" for all of us.
No overarching morality needed, no beyond-the-grave coercion needed, no gods needed. Don't think so? Then let the oil, electricity, clean water, and food distribution networks break down and see what happens to our wonderful little civilization and all our loving, considerate, god-fearing, moral people.